Packet duplication for high reliability communication

ABSTRACT

Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for increasing the chances that a high reliability packet scheduled to be transmitted in a shared radio frequency spectrum is received by a receiving device. In one example, a wireless device (e.g., a base station or a user equipment (UE)) may duplicate a packet at a packet data convergence protocol (PDCP) layer for transmission on multiple listen before talk (LBT) subchannels of a carrier to improve reliability. In another example, a wireless device may duplicate a packet at a physical (PHY) layer for transmission on multiple LBT subchannels of a carrier to improve reliability, or the wireless device may encode and map the packet to multiple LBT subchannels of a carrier for transmission on the multiple LBT subchannels to improve reliability.

CROSS REFERENCE

The present application for patent claims the benefit of U.S.Provisional Patent Application No. 62/753,046 by YERRAMALLI et al.,entitled “PACKET DUPLICATION FOR HIGH RELIABILITY COMMUNICATION,” filedOct. 30, 2018, assigned to the assignee hereof, which is herebyincorporated by reference in its entirety.

BACKGROUND

The following relates generally to wireless communications and morespecifically to packet duplication for high reliability communication.

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform spread orthogonal frequency division multiplexing(DFT-S-OFDM).

A wireless multiple-access communications system may include a number ofbase stations or network access nodes, each simultaneously supportingcommunication for multiple communication devices, which may be otherwiseknown as user equipment (UE). In some wireless communications systems,wireless devices (e.g., UEs and base stations) may support highreliability communication (e.g., transmission and reception of highreliability packets). In some cases, it may be appropriate for awireless device to transmit or receive a high reliability packet in ashared radio frequency spectrum. The shared radio frequency spectrum maybe a spectrum that is unlicensed, licensed to multiple operators, orlicensed to a single operator with opportunistic access by otherdevices. Conventional techniques for supporting high reliabilitycommunications in a shared radio frequency spectrum may be deficient.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support high reliability communications in a sharedradio frequency spectrum. Generally, the described techniques providefor increasing the chances that a high reliability packet scheduled tobe transmitted in a shared radio frequency spectrum is received by areceiving device. In one example, a wireless device (e.g., a basestation or a user equipment (UE)) may duplicate a packet at a packetdata convergence protocol (PDCP) layer for transmission on multiplelisten before talk (LBT) subchannels of a carrier to improvereliability. In another example, a wireless device may duplicate apacket at a physical (PHY) layer for transmission on multiple LBTsubchannels of a carrier to improve reliability, or the wireless devicemay encode and map the packet to multiple LBT subchannels of a carrierfor transmission on the multiple LBT subchannels to improve reliability.

A method for wireless communication by a user equipment is described.The method may include receiving configuration signaling indicating amapping of a first logical channel to a first subchannel of a carrierand a second logical channel to a second subchannel of the carrier andtransmitting or receiving a transmission of a first data packet via thefirst subchannel of the carrier and a duplicate of the transmissionassociated with the second logical channel via the second subchannel ofthe carrier based on the mapping.

An apparatus for wireless communication by a user equipment isdescribed. The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to receive configuration signaling indicating a mapping of afirst logical channel to a first subchannel of a carrier and a secondlogical channel to a second subchannel of the carrier and transmit orreceiving a transmission of a first data packet via the first subchannelof the carrier and a duplicate of the transmission associated with thesecond logical channel via the second subchannel of the carrier based onthe mapping.

Another apparatus for wireless communication by a user equipment isdescribed. The apparatus may include means for receiving configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier and transmitting or receiving a transmissionof a first data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping.

A non-transitory computer-readable medium storing code for wirelesscommunication by a user equipment is described. The code may includeinstructions executable by a processor to receive configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier and transmit or receiving a transmission of afirst data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for generating a first datapacket for the first logical channel and a duplicate first data packetfor the second logical channel. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein the transmitting or receiving further may include transmittingthe transmission comprising the first data packet via the firstsubchannel of the carrier and the duplicate of the transmissioncomprising the duplicate first data packet via the second subchannel ofthe carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the mapping indicates asecond mapping of a third logical channel to a third subchannel of thecarrier, and where the method further may include operations, features,means, or instructions for transmitting or receiving a second duplicateof the transmission via the third subchannel of the carrier based on thesecond mapping. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, receiving theconfiguration signaling further may include operations, features, means,or instructions for receiving the configuration signaling indicating aprohibited subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the transmitting or receivingfurther may include operations, features, means, or instructions forperforming a first listen before talk procedure on the first subchannelprior to transmitting the transmission, and performing a second listenbefore talk procedure on the second subchannel prior to transmitting theduplicate of the transmission. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, each of the first subchannel and the second subchannel may be adifferent listen before talk subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the first subchanneland the second subchannel may be a different bandwidth part of thecarrier. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first logical channel maybe associated with a first channel identifier that differs from a secondchannel identifier of the second logical channel. In some examples ofthe method, apparatuses, and non-transitory computer-readable mediumdescribed herein, the first data packet may be a PDCP packet.

A method for wireless communication by a user equipment is described.The method may include receiving one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier and transmitting or receiving the transmissionvia the first subchannel and the second subchannel of the carrier basedon the one or more grants.

An apparatus for wireless communication by a user equipment isdescribed. The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to receive one or more grants scheduling transmission of afirst data packet in a first subchannel and a second subchannel of acarrier and transmit or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based on the one ormore grants.

Another apparatus for wireless communication by a user equipment isdescribed. The apparatus may include means for receiving one or moregrants scheduling transmission of a first data packet in a firstsubchannel and a second subchannel of a carrier and transmitting orreceiving the transmission via the first subchannel and the secondsubchannel of the carrier based on the one or more grants.

A non-transitory computer-readable medium storing code for wirelesscommunication by a user equipment is described. The code may includeinstructions executable by a processor to receive one or more grantsscheduling transmission of a first data packet in a first subchannel anda second subchannel of a carrier and transmit or receiving thetransmission via the first subchannel and the second subchannel of thecarrier based on the one or more grants.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving configurationsignaling indicating a rate matching scheme. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the transmitting or receiving further may includeoperations, features, means, or instructions for receiving a firsttransmission of the first data packet via the first subchannel of thecarrier and a second transmission of the first data packet via thesecond subchannel of the carrier, de-rate matching the firsttransmission to generate a de-rate matched first transmission based onthe rate matching scheme, de-rate matching the second transmission togenerate a de-rate matched second transmission based on the ratematching scheme, and applying a decoding algorithm to the de-ratematched first transmission, the de-rate matched second transmission, orboth.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the de-rate matched first transmission includes a firstredundancy version generated from the first data packet and at least aportion of a second redundancy version generated from the first datapacket. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the de-rate matched second transmission includes thefirst redundancy version of the first data packet and at least a portionof a third redundancy version of the first data packet, the secondredundancy version differing from the third redundancy version.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the transmitting or receivingfurther may include operations, features, means, or instructions forrate matching a first transmission of the first data packet to generatea rate matched first transmission based on the rate matching scheme,rate matching a second transmission of the first data packet to generatea rate matched second transmission based on the rate matching scheme,and transmitting the rate matched first transmission via the firstsubchannel of the carrier and the rate matched second transmission viathe second subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the rate matched first transmission includes a firstredundancy version generated from the first data packet and at least aportion of a second redundancy version generated from the first datapacket. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the rate matched second transmission includes the firstredundancy version generated from the first data packet and at least aportion of a third redundancy version generated from the first datapacket, the second redundancy version differing from the thirdredundancy version.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving configurationsignaling indicating a code rate, and decoding the transmission based onthe code rate. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, the code ratemay be smaller than ⅓ of a number of subchannels to which transmissionsof the data packet may be mapped.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, receiving the one or moregrants further may include operations, features, means, or instructionsfor receiving a first grant scheduling a first transmission of the firstdata packet via the first subchannel of the carrier and a second grantscheduling a second transmission of the first data packet via the secondsubchannel of the carrier. Some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein may furtherinclude operations, features, means, or instructions for determining anassociation between the first transmission and the second transmissionbased on the first grant and the second grant, and soft combining thefirst transmission and the second transmission to decode the first datapacket based on the association.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the associationfurther may include operations, features, means, or instructions foridentifying a common feedback identifier for the first subchannel of thecarrier and the second subchannel of the carrier within a sametransmission time interval, where the first transmission and the secondtransmission each correspond to the common feedback identifier. Someexamples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a jointfeedback message via the first subchannel, the second subchannel, orboth, to provide joint feedback on the first transmission and the secondtransmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a firstfeedback message via the first subchannel of the carrier to providefeedback on the first transmission and a second feedback message via thesecond subchannel of the carrier to provide feedback on the secondtransmission. Some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein may furtherinclude operations, features, means, or instructions for generating thefirst data packet to include a duplication tag, and generating a firsttransmission including the first packet and a second transmissionincluding the first data packet based on the duplication tag, where thetransmitting or receiving further includes. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the first data packet may be a medium access controlservice data unit (MAC-SDU).

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving configurationsignaling indicating at least one feedback resource for the firstsubchannel, the second subchannel, or both, and transmitting, via the atleast one feedback resource, a feedback message. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the transmitting or receiving further may includeoperations, features, means, or instructions for receiving a firsttransmission of the first data packet via the first subchannel of thecarrier and a second transmission of the first data packet via thesecond subchannel of the carrier, where the feedback message may be ajoint feedback message that provides feedback for the first transmissionand the second transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the first subchanneland the second subchannel may be a different listen before talksubchannel of the carrier. In some examples of the method, apparatuses,and non-transitory computer-readable medium described herein, each ofthe first subchannel and the second subchannel may be a differentbandwidth part of the carrier. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the transmitting or receiving further may include operations,features, means, or instructions for receiving a first transmission ofthe first data packet via the first subchannel of the carrier and asecond transmission of the first data packet via the second subchannelof the carrier, where each of the first transmission and the secondtransmission may be self-decodable. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the first data packet may be a PDCP packet.

A method for wireless communication by a base station is described. Themethod may include transmitting configuration signaling indicating amapping of a first logical channel to a first subchannel of a carrierand a second logical channel to a second subchannel of the carrier andtransmitting or receiving a transmission of a first data packet via thefirst subchannel of the carrier and a duplicate of the transmissionassociated with the second logical channel via the second subchannel ofthe carrier based on the mapping.

An apparatus for wireless communication by a base station is described.The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to transmit configuration signaling indicating a mapping of afirst logical channel to a first subchannel of a carrier and a secondlogical channel to a second subchannel of the carrier and transmit orreceiving a transmission of a first data packet via the first subchannelof the carrier and a duplicate of the transmission associated with thesecond logical channel via the second subchannel of the carrier based onthe mapping.

Another apparatus for wireless communication by a base station isdescribed. The apparatus may include means for transmittingconfiguration signaling indicating a mapping of a first logical channelto a first subchannel of a carrier and a second logical channel to asecond subchannel of the carrier and transmitting or receiving atransmission of a first data packet via the first subchannel of thecarrier and a duplicate of the transmission associated with the secondlogical channel via the second subchannel of the carrier based on themapping.

A non-transitory computer-readable medium storing code for wirelesscommunication by a base station is described. The code may includeinstructions executable by a processor to transmit configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier and transmit or receiving a transmission of afirst data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for generating a first datapacket for the first logical channel and a duplicate first data packetfor the second logical channel. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein the transmitting or receiving further may include transmittingthe transmission comprising the first data packet via the firstsubchannel of the carrier and the duplicate of the transmissioncomprising the duplicate first data packet via the second subchannel ofthe carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the mapping indicates asecond mapping of a third logical channel to a third subchannel of thecarrier, and where the method further may include operations, features,means, or instructions for transmitting or receiving a second duplicateof the transmission via the third subchannel of the carrier based on thesecond mapping. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, transmittingthe configuration signaling further may include operations, features,means, or instructions for transmitting the configuration signalingindicating a prohibited subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the transmitting or receivingfurther may include operations, features, means, or instructions forperforming a listen before talk procedure on each of the each of thefirst subchannel and the second subchannel prior to transmitting thetransmission and the duplicate of the transmission. In some examples ofthe method, apparatuses, and non-transitory computer-readable mediumdescribed herein, each of the first subchannel and the second subchannelmay be a different listen before talk subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the first subchanneland the second subchannel may be a different bandwidth part of thecarrier. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first logical channel maybe associated with a first channel identifier that differs from a secondchannel identifier of the second logical channel. In some examples ofthe method, apparatuses, and non-transitory computer-readable mediumdescribed herein, the first data packet may be a PDCP packet.

A method for wireless communication by a base station is described. Themethod may include transmitting one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier and transmitting or receiving the transmissionvia the first subchannel and the second subchannel of the carrier basedon the one or more grants.

An apparatus for wireless communication by a base station is described.The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to transmit one or more grants scheduling transmission of afirst data packet in a first subchannel and a second subchannel of acarrier and transmit or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based on the one ormore grants.

Another apparatus for wireless communication by a base station isdescribed. The apparatus may include means for transmitting one or moregrants scheduling transmission of a first data packet in a firstsubchannel and a second subchannel of a carrier and transmitting orreceiving the transmission via the first subchannel and the secondsubchannel of the carrier based on the one or more grants.

A non-transitory computer-readable medium storing code for wirelesscommunication by a base station is described. The code may includeinstructions executable by a processor to transmit one or more grantsscheduling transmission of a first data packet in a first subchannel anda second subchannel of a carrier and transmit or receiving thetransmission via the first subchannel and the second subchannel of thecarrier based on the one or more grants.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmittingconfiguration signaling indicating a rate matching scheme. In someexamples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the transmitting or receivingfurther may include operations, features, means, or instructions forreceiving a first transmission of the first data packet via the firstsubchannel of the carrier and a second transmission of the first datapacket via the second subchannel of the carrier, de-rate matching thefirst transmission to generate a de-rate matched first transmissionbased on the rate matching scheme, de-rate matching the secondtransmission to generate a de-rate matched second transmission based onthe rate matching scheme, and applying a decoding algorithm to thede-rate matched first transmission, the de-rate matched secondtransmission, or both.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the de-rate matched first transmission includes a firstredundancy version generated from the first data packet and at least aportion of a second redundancy version generated from the first datapacket. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the de-rate matched second transmission includes thefirst redundancy version of the first data packet and at least a portionof a third redundancy version of the first data packet, the secondredundancy version differing from the third redundancy version.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the transmitting or receivingfurther may include operations, features, means, or instructions forrate matching a first transmission of the first data packet to generatea rate matched first transmission based on the rate matching scheme,rate matching a second transmission of the first data packet to generatea rate matched second transmission based on the rate matching scheme,and transmitting the rate matched first transmission via the firstsubchannel of the carrier and the rate matched second transmission viathe second subchannel of the carrier.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the rate matched first transmission includes a firstredundancy version generated from the first data packet and at least aportion of a second redundancy version generated from the first datapacket. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the rate matching schemeindicates that the rate matched second transmission includes the firstredundancy version generated from the first data packet and at least aportion of a third redundancy version generated from the first datapacket, the second redundancy version differing from the thirdredundancy version.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmittingconfiguration signaling indicating a code rate, and decoding thetransmission based on the code rate. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the code rate may be smaller than ⅓ of a number of subchannelsto which transmissions of the data packet may be mapped.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, transmitting the one or moregrants further may include operations, features, means, or instructionsfor transmitting a first grant scheduling a first transmission of thefirst data packet via the first subchannel of the carrier and a secondgrant scheduling a second transmission of the first data packet via thesecond subchannel of the carrier. Some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein may further include operations, features, means, or instructionsfor determining an association between the first transmission and thesecond transmission based on the first grant and the second grant, andsoft combining the first transmission and the second transmission todecode the first data packet based on the association.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the associationfurther may include operations, features, means, or instructions foridentifying a common feedback identifier for the first subchannel of thecarrier and the second subchannel of the carrier within a sametransmission time interval, where the first transmission and the secondtransmission each correspond to the common feedback identifier. Someexamples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a jointfeedback message via the first subchannel, the second subchannel, orboth, that provides joint feedback on the first transmission and thesecond transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a firstfeedback message via the first subchannel of the carrier that providesfeedback on the first transmission and a second feedback message via thesecond subchannel of the carrier that provides feedback on the secondtransmission. Some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein may furtherinclude operations, features, means, or instructions for generating thefirst data packet to include a duplication tag, and generating a firsttransmission including the first packet and a second transmissionincluding the first data packet based on the duplication tag, where thetransmitting or receiving further includes. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the first data packet may be a MAC-SDU.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmittingconfiguration signaling indicating at least one feedback resource forthe first subchannel, the second subchannel, or both, and receiving, viathe at least one feedback resource, a feedback message. In some examplesof the method, apparatuses, and non-transitory computer-readable mediumdescribed herein, the transmitting or receiving further may includeoperations, features, means, or instructions for transmitting a firsttransmission of the first data packet via the first subchannel of thecarrier and a second transmission of the first data packet via thesecond subchannel of the carrier, where the feedback message may be ajoint feedback message that provides feedback for the first transmissionand the second transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the first subchanneland the second subchannel may be a different listen before talksubchannel of the carrier. In some examples of the method, apparatuses,and non-transitory computer-readable medium described herein, each ofthe first subchannel and the second subchannel may be a differentbandwidth part of the carrier. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the transmitting or receiving further may include operations,features, means, or instructions for transmitting a first transmissionof the first data packet via the first subchannel of the carrier and asecond transmission of the first data packet via the second subchannelof the carrier, where each of the first transmission and the secondtransmission may be self-decodable. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the first data packet may be a PDCP packet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 and 2 illustrate examples of wireless communications systems inaccordance with aspects of the present disclosure.

FIG. 3 illustrates an example of data packet duplication at a packetdata convergence protocol (PDCP) in accordance with aspects of thepresent disclosure.

FIGS. 4 and 5 illustrate examples of process flows in accordance withaspects of the present disclosure.

FIGS. 6 and 7 show block diagrams of devices in accordance with aspectsof the present disclosure.

FIG. 8 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device in accordance withaspects of the present disclosure.

FIGS. 10 and 11 show block diagrams of devices in accordance withaspects of the present disclosure.

FIG. 12 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 13 shows a diagram of a system including a device in accordancewith aspects of the present disclosure.

FIGS. 14-17 show flowcharts illustrating methods in accordance withaspects of the present disclosure.

DETAILED DESCRIPTION

Some wireless communications systems may support high reliabilitycommunications in a shared radio frequency spectrum band (e.g.,ultra-reliable low latency communications (URLLC) in an unlicensedspectrum (URLLC-U)). In some cases, a wireless device (e.g., basestation or user equipment (UE)) may not be able to gain access to alisten-before-talk (LBT) subchannel for a transmission of a highreliability packet (e.g., a packet associated with high reliabilityrequirements) in a shared radio frequency band (e.g., when the LBTsubchannel is being used by another wireless device). In such cases, thewireless device may not be able to transmit the high reliability packeton the LBT subchannel. Further, even if the wireless device is able togain access to an LBT subchannel to transmit a high reliability packet,the transmission of the high reliability packet on the single LBTsubchannel may not be reliable (e.g., when channel conditions are poor).

As described herein, a wireless communications system may supportefficient techniques for increasing the chances that a high reliabilitypacket scheduled to be transmitted in a shared radio frequency spectrumis received by a receiving device. In particular, wireless devices maysupport techniques for transmitting or receiving a high reliabilitypacket on multiple LBT subchannels of a carrier in the shared radiofrequency spectrum. In one example, a wireless device (e.g., a basestation or a user equipment (UE)) may duplicate a packet at a packetdata convergence protocol (PDCP) layer for transmission on multiple LBTsubchannels of a carrier to improve reliability. In another example, awireless device may duplicate a packet at a physical (PHY) layer fortransmission on multiple LBT subchannels of a carrier to improvereliability, or the wireless device may encode and map the packet tomultiple LBT subchannels of a carrier for transmission on the multipleLBT subchannels to improve reliability.

Aspects of the disclosure introduced above are described herein in thecontext of a wireless communications system. Examples of processes andsignaling exchanges that support packet duplication for high reliabilitycommunication are then described. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to packet duplication forhigh reliability communication.

FIG. 1 illustrates an example of a wireless communications system 100 inaccordance with aspects of the present disclosure. The wirelesscommunications system 100 includes base stations 105, UEs 115, and acore network 130. In some examples, the wireless communications system100 may be a Long-Term Evolution (LTE) network, an LTE-Advanced (LTE-A)network, an LTE-A Pro network, or a New Radio (NR) network. In somecases, wireless communications system 100 may support enhanced broadbandcommunications, ultra-reliable (e.g., mission critical) communications,low latency communications, ultra-reliable low latency communications(URLLC), or communications with low-cost and low-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 via one ormore base station antennas. Base stations 105 described herein mayinclude or may be referred to by those skilled in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB orgiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or some other suitable terminology. Wirelesscommunications system 100 may include base stations 105 of differenttypes (e.g., macro or small cell base stations). The UEs 115 describedherein may be able to communicate with various types of base stations105 and network equipment including macro eNBs, small cell eNBs, gNBs,relay base stations, and the like.

Each base station 105 may be associated with a particular geographiccoverage area 110 in which communications with various UEs 115 issupported. Each base station 105 may provide communication coverage fora respective geographic coverage area 110 via communication links 125,and communication links 125 between a base station 105 and a UE 115 mayutilize one or more carriers. Communication links 125 shown in wirelesscommunications system 100 may include uplink transmissions from a UE 115to a base station 105 (e.g., in a physical uplink shared channel (PUSCH)or a physical uplink control channel (PUCCH)) or downlink transmissionsfrom a base station 105 to a UE 115 (e.g., in a physical downlink sharedchannel (PDSCH) or a physical downlink control channel (PDCCH)).Downlink transmissions may also be called forward link transmissionswhile uplink transmissions may also be called reverse linktransmissions.

The geographic coverage area 110 for a base station 105 may be dividedinto sectors making up a portion of the geographic coverage area 110,and each sector may be associated with a cell. For example, each basestation 105 may provide communication coverage for a macro cell, a smallcell, a hot spot, or other types of cells, or various combinationsthereof. In some examples, a base station 105 may be movable andtherefore provide communication coverage for a moving geographiccoverage area 110. In some examples, different geographic coverage areas110 associated with different technologies may overlap, and overlappinggeographic coverage areas 110 associated with different technologies maybe supported by the same base station 105 or by different base stations105. The wireless communications system 100 may include, for example, aheterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different typesof base stations 105 provide coverage for various geographic coverageareas 110.

The term “cell” may refer to a logical communication entity used forcommunication with a base station 105 (e.g., over a carrier), and may beassociated with an identifier for distinguishing neighboring cells(e.g., a physical cell identifier (PCID), a virtual cell identifier(VCID)) operating via the same or a different carrier. In some examples,a carrier may support multiple cells, and different cells may beconfigured according to different protocol types (e.g., machine-typecommunication (MTC), narrowband Internet-of-Things (NB-IoT), enhancedmobile broadband (eMBB), or others) that may provide access fordifferent types of devices. In some cases, the term “cell” may refer toa portion of a geographic coverage area 110 (e.g., a sector) over whichthe logical entity operates.

UEs 115 may be dispersed throughout the wireless communications system100, and each UE 115 may be stationary or mobile. A UE 115 may also bereferred to as a mobile device, a wireless device, a remote device, ahandheld device, or a subscriber device, or some other suitableterminology, where the “device” may also be referred to as a unit, astation, a terminal, or a client. A UE 115 may also be a personalelectronic device such as a cellular phone, a personal digital assistant(PDA), a tablet computer, a laptop computer, or a personal computer. Insome examples, a UE 115 may also refer to a wireless local loop (WLL)station, an Internet of Things (IoT) device, an Internet of Everything(IoE) device, or an MTC device, or the like, which may be implemented invarious articles such as appliances, vehicles, meters, or the like.

Base stations 105 may communicate with the core network 130 and with oneanother. For example, base stations 105 may interface with the corenetwork 130 through backhaul links 132 (e.g., via an S1, N2, N3, orother interface). Base stations 105 may communicate with one anotherover backhaul links 134 (e.g., via an X2, Xn, or other interface) eitherdirectly (e.g., directly between base stations 105) or indirectly (e.g.,via core network 130).

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC), which may include at least one mobilitymanagement entity (MME), at least one serving gateway (S-GW), and atleast one Packet Data Network (PDN) gateway (P-GW). The MME may managenon-access stratum (e.g., control plane) functions such as mobility,authentication, and bearer management for UEs 115 served by basestations 105 associated with the EPC. User IP packets may be transferredthrough the S-GW, which itself may be connected to the P-GW. The P-GWmay provide IP address allocation as well as other functions. The P-GWmay be connected to the network operators IP services. The operators IPservices may include access to the Internet, Intranet(s), an IPMultimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, mayinclude subcomponents such as an access network entity, which may be anexample of an access node controller (ANC). Each access network entitymay communicate with UEs 115 through a number of other access networktransmission entities, which may be referred to as a radio head, a smartradio head, or a transmission/reception point (TRP). In someconfigurations, various functions of each access network entity or basestation 105 may be distributed across various network devices (e.g.,radio heads and access network controllers) or consolidated into asingle network device (e.g., a base station 105).

In some cases, wireless communications system 100 may be a packet-basednetwork that operates according to a layered protocol stack. In the userplane, communications at the bearer or Packet Data Convergence Protocol(PDCP) layer may be IP-based. A Radio Link Control (RLC) layer mayperform packet segmentation and reassembly to communicate over logicalchannels. A Medium Access Control (MAC) layer may perform priorityhandling and multiplexing of logical channels into transport channels.The MAC layer may also use hybrid automatic repeat request (HARQ) toprovide retransmission at the MAC layer to improve link efficiency. Inthe control plane, the Radio Resource Control (RRC) protocol layer mayprovide establishment, configuration, and maintenance of an RRCconnection between a UE 115 and a base station 105 or core network 130supporting radio bearers for user plane data. At the Physical layer,transport channels may be mapped to physical channels.

In some cases, UEs 115 and base stations 105 may support retransmissionsof data to increase the likelihood that data is received successfully.HARQ feedback is one technique of increasing the likelihood that data isreceived correctly over a communication link 125. HARQ may include acombination of error detection (e.g., using a cyclic redundancy check(CRC)), forward error correction (FEC), and retransmission (e.g.,automatic repeat request (ARQ)). HARQ may improve throughput at the MAClayer in poor radio conditions (e.g., signal-to-noise conditions). Insome cases, a wireless device may support same-slot HARQ feedback, wherethe device may provide HARQ feedback in a specific slot for datareceived in a previous symbol in the slot. In other cases, the devicemay provide HARQ feedback in a subsequent slot, or according to someother time interval.

Time intervals in LTE or NR may be expressed in multiples of a basictime unit, which may, for example, refer to a sampling period ofT_(s)=1/30,720,000 seconds. Time intervals of a communications resourcemay be organized according to radio frames each having a duration of 10milliseconds (ms), where the frame period may be expressed asT_(f)=307,200 T_(s). The radio frames may be identified by a systemframe number (SFN) ranging from 0 to 1023. Each frame may include 10subframes numbered from 0 to 9, and each subframe may have a duration of1 ms. A subframe may be further divided into 2 slots each having aduration of 0.5 ms, and each slot may contain 6 or 7 modulation symbolperiods (e.g., depending on the length of the cyclic prefix prepended toeach symbol period). Excluding the cyclic prefix, each symbol period maycontain 2048 sampling periods. In some cases, a subframe may be thesmallest scheduling unit of the wireless communications system 100 andmay be referred to as a transmission time interval (TTI). In othercases, a smallest scheduling unit of the wireless communications system100 may be shorter than a subframe or may be dynamically selected (e.g.,in bursts of shortened TTIs (sTTIs) or in selected component carriersusing sTTIs).

The term “carrier” may refer to a set of radio frequency spectrumresources having a defined physical layer structure for supportingcommunications over a communication link 125. For example, a carrier ofa communication link 125 may include a portion of a radio frequencyspectrum band that is operated according to physical layer channels fora given radio access technology. Each physical layer channel may carryuser data, control information, or other signaling. A carrier may beassociated with a pre-defined frequency channel (e.g., an evolveduniversal mobile telecommunication system terrestrial radio access(E-UTRA) absolute radio frequency channel number (EARFCN)) and may bepositioned according to a channel raster for discovery by UEs 115.Carriers may be downlink or uplink (e.g., in a frequency divisionduplexing (FDD) mode) or may be configured to carry downlink and uplinkcommunications (e.g., in a time division duplexing (TDD) mode). In someexamples, signal waveforms transmitted over a carrier may be made up ofmultiple sub-carriers (e.g., using multi-carrier modulation (MCM)techniques such as orthogonal frequency division multiplexing (OFDM) ordiscrete Fourier transform spread OFDM (DFT-S-OFDM)).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of predetermined bandwidths for carriers of a particularradio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). Insome examples, each served UE 115 may be configured for operating overportions or all of the carrier bandwidth. In other examples, some UEs115 may be configured for operation using a narrowband protocol typethat is associated with a predefined portion or range (e.g., set ofsubcarriers or RBs) within a carrier (e.g., “in-band” deployment of anarrowband protocol type).

In some cases, wireless communications system 100 may utilize bothunshared (e.g., licensed) and shared (e.g., unlicensed) radio frequencyspectrum bands. For example, wireless communications system 100 mayemploy License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radioaccess technology, or NR technology in an unlicensed band such as the 5GHz industrial, scientific and medical (ISM) band. When operating inunlicensed radio frequency spectrum bands, wireless devices such as basestations 105 and UEs 115 may employ listen-before-talk (LBT) proceduresto ensure a frequency channel (e.g., an LBT subchannel or a frequencyband that is accessible via a LBT procedure) is clear beforetransmitting data. In some cases, operations in unlicensed bands may bebased on a carrier aggregation configuration in conjunction withcomponent carriers operating in a licensed band (e.g., LAA). Operationsin unlicensed spectrum may include downlink transmissions, uplinktransmissions, peer-to-peer transmissions, or a combination of these.Duplexing in unlicensed spectrum may be based on FDD, TDD, or acombination of both.

Wireless communications system 100 may support high reliabilitycommunications in a shared radio frequency spectrum band (e.g.,URLLC-U). In some cases, however, a wireless device (e.g., UE 115 orbase station 105) may not be able to gain access to an LBT subchannelfor a transmission of a high reliability packet (e.g., a packetassociated with high reliability requirements) in a shared radiofrequency band (e.g., when the LBT subchannel is being used by anotherwireless device). In such cases, the wireless device may not be able totransmit the high reliability packet on the LBT subchannel. Further,even if the wireless device is able to gain access to an LBT subchannelto transmit a high reliability packet, the transmission of the highreliability packet on the single LBT subchannel may not be reliable(e.g., when channel conditions are poor). Wireless communications system100 may support efficient techniques for increasing the chances that ahigh reliability packet to be transmitted in a shared radio frequencyspectrum is received by a receiving device.

FIG. 2 illustrates an example of a wireless communications system 200 inaccordance with aspects of the present disclosure. Wirelesscommunications system 200 includes base station 105-a, which may be anexample of a base station 105 described with reference to FIG. 1.Wireless communications system 200 also includes UE 115-a, which may bean example of a UE 115 described with reference to FIG. 1. Base station105-a may provide communication coverage for a respective coverage area110-a. Base station 105-a may communicate with UE 115-a on resources ofa carrier 205 in a shared radio frequency spectrum. Wirelesscommunications system 200 may implement aspects of wirelesscommunications system 100. For example, wireless communications system200 may support efficient techniques for increasing the chances that ahigh reliability packet to be transmitted in a shared radio frequencyspectrum is received by a receiving device.

In the example of FIG. 2, base station 105-a may be scheduled for a datatransmission to UE 115-a. Using the techniques described herein, thebase station 105-a may transmit the data to the UE on the first LBTsubchannel 210-a and the second LBT subchannel 210-b within a samecarrier 205. In one aspect, the base station 105-a may generate a datapacket at a PDCP layer, and the base station 105-a may duplicate thedata packet at the PDCP layer for transmission to UE 115-a on the firstLBT subchannel 210-a and the second LBT subchannel 210-b. In anotheraspect, the base station 105-a may generate a data packet, and the basestation 105-a may duplicate the data packet at a PHY layer fortransmission to UE 115-a on the first LBT subchannel 210-a and thesecond LBT subchannel 210-b, or the base station 105-a may map the datapacket to the first LBT subchannel 210-a and the second subchannel210-b. Although these aspects are described independently, it is to beunderstood that the techniques may be combined for transmission of dataacross multiple LBT subchannels 210 in a shared radio frequency spectrum(e.g., unlicensed radio frequency spectrum). Further, although theexamples described relate to a downlink transmission from a base station105-a to a UE 115-a, it is to be understood that the same or similartechniques may be applied for an uplink transmission from a UE 115-a toa base station 105-a.

FIG. 3 illustrates an example of data packet duplication 300 at a PDCPlayer in accordance with aspects of the present disclosure. In oneexample of FIG. 3, base station 105-b may be scheduled for a datatransmission to UE 115-b. Accordingly, using the techniques describedherein, base station 105-b may generate a data packet and duplicate thedata packet at a PDCP entity 310-a for transmission on first and secondLBT subchannels 305 on a carrier. Specifically, the PDCP entity 310-a atthe base station 105-b may receive a PDCP service data unit (SDU) in theform of an IP packet, and the PDCP entity 310-a may identify that the IPpacket is to be duplicated for transmission to improve reliability(e.g., based on a flow associated with the IP packet having a highreliability requirement). Thus, a duplication function at the PDCPentity 310-a may duplicate the PDCP SDU.

The PDCP entity 310-a may then pass the original data packet as a firstPDCP protocol data unit (PDU) to a first RLC entity 315-a and pass theduplicated data packet as a second PDCP PDU to a second RLC entity315-a. The first RLC entity 315-a may receive the original data packetas a first RLC SDU and may map the original data packet to a firstlogical channel, and the second RLC entity 315-b may receive theduplicated data packet as a second RLC SDU and may map the duplicateddata packet to a second logical channel (e.g., where the first andsecond logical channels have different IDs but are of the same type).The first RLC entity 315-a may then pass the original data packet mappedto the first logical channel as an RLC PDU to MAC entity 320-a, and thesecond RLC entity 315-b may pass the duplicated data packet mapped tothe second logical channel as another RLC PDU to MAC entity 320-a.

The MAC entity 320-a may receive the original data packet mapped to thefirst logical channel and the duplicated data packet mapped to thesecond logical channel, and the MAC entity 320-a may map the firstlogical channel including the original data packet to the first LBTsubchannel 305-a and the second logical channel including the duplicateddata packet to the second LBT subchannel 305-b. In some cases, a firstHARQ entity 325-a associated with transmissions on the first LBTsubchannel 305-a on a carrier may map the first logical channel to thefirst LBT subchannel 305-a, and a second HARQ entity 325-b associatedwith transmissions on the second LBT subchannel 305-b on a carrier maymap the second logical channel to the second LBT subchannel 305-b. Inother cases, however, a same HARQ entity associated with transmissionson the carrier may map the first logical channel to the first LBTsubchannel 305-a and map the second logical channel to the second LBTsubchannel 305-b.

Once the logical channels including the original and duplicated datapackets are mapped to corresponding subchannels 305, the MAC entity320-a may pass the original data packet and the duplicated data packetto the PHY layer for transmission to UE 115-a. In some cases, basestation 105-b may configure a mapping of each logical channel to aparticular LBT subchannel or a group of LBT subchannels. This mappingmay then be signaled to UE 115-a to be used for receiving andtransmitting data packets. Thus, the first logical channel including theoriginal data packet and the second logical channel including theduplicated data packet may be mapped to LBT subchannels based on theconfiguration. The transmission of the data on multiple LBT subchannelsmay improve the chances that the data is received by UE 115-b. In theevent that the UE 115-b receives both data packets (i.e., the originaldata packet and the duplicated data packet), the UE 115-b may identifythat one of the data packets is a duplicate of the other (e.g., at aPDCP layer), and the UE 115-b may discard the duplicated data packet.

The example described with reference to FIG. 3 relates to packetduplication at a PDCP layer of a wireless device (e.g., a base station105 or a UE 115). As described herein, in another example, a wirelessdevice may support techniques at a PHY layer for improving thereliability of a data transmission. In particular, a wireless device mayduplicate a packet at a PHY layer for transmission on multiple LBTsubchannels, or the wireless device may map the packet to multiple LBTsubchannels of a carrier for transmission on the multiple LBTsubchannels. In some cases, the packets to be transmitted on multipleLBT subchannels may be marked at the PDCP layer for diversitytransmission across the multiple LBT subchannels (e.g., using aduplication tag or some other tag). As such, MAC SDUs that are markedfor diversity transmission may be aggregated together to form a MAC PDU,and the MAC PDU may be passed to the PHY layer and transmitted onmultiple LBT subchannels.

In one aspect, a UE 115 may receive a single PDCCH grant scheduling adownlink transmission (e.g., PDSCH transmission) or an uplinktransmission (e.g., PUSCH transmission) across multiple LBT subchannels,and the UE 115 (e.g., for an uplink transmission) or the base station105 (e.g., for a downlink transmission) may map the packet to themultiple LBT subchannels of a carrier for transmission on the multipleLBT subchannels based on receiving the single PDCCH grant. In anunshared (e.g., licensed) radio frequency spectrum, for transmissionsacross multiple carriers, transport blocks may be mapped to the carriersin a frequency first, time second manner across multiple carriers orwithin each carrier. Since the transmissions across multiple carriersmay be guaranteed in the unshared radio frequency spectrum, a receivingdevice may then be able to combine transmissions across the multiplecarriers to decode the transport block and identify the data intendedfor the receiving device.

In a shared radio frequency spectrum (e.g., unlicensed radio frequencyspectrum), however, a scheduled transmission on an LBT subchannel maynot actually be transmitted if a base station 105 or UE 115 fails togain access to the LBT subchannel (e.g., based on whether clear channelassessment (CCA) is successful). Thus, a receiving device may not beable to combine transmissions across multiple LBT subchannels toidentify the data intended for the receiving device. As describedherein, a transmitting device may support efficient techniques fortransmitting a packet on multiple LBT subchannels to a receiving devicesuch that the transmission on each LBT subchannel may be self-decodable(i.e., the receiving device may identify the data intended for thereceiving device from a transmission on each LBT subchannel).

In one example, the transmitting device may use a low code for atransmission on each LBT subchannel such that most or all of thesystematic bits of a packet are transmitted on each LBT subchannel. Inanother example, the transmitting device may rate match a packet acrossmultiple LBT subchannels such that a transmission on each LBT subchannelis self-decodable. For instance, the transmitting device may rate matchredundancy version zero and redundancy version one of a packet to afirst LBT subchannel, and the transmitting device may rate matchredundancy version zero and redundancy version two of the packet to asecond LBT subchannel. For a downlink transmission, PUCCH resources maybe assigned to one or more LBT subchannels to be used to acknowledge thesame PHY layer transmission (e.g., where a UE 115 may use one or moreresources on an LBT subchannel on which a CCA succeeds to send HARQfeedback).

In another aspect, a UE 115 may receive multiple PDCCH grants schedulingdownlink transmissions (e.g., PDSCH transmission) or uplinktransmissions (e.g., PUSCH transmission) on multiple LBT subchannels(e.g., one PDCCH grant per LBT subchannel), and the UE 115 (e.g., for anuplink transmission) or the base station 105 (e.g., for a downlinktransmission) may duplicate a packet at a PHY layer for transmission onthe multiple LBT subchannels of a carrier. In this aspect, a receivingdevice may determine an association between duplicate transmissionsacross multiple LBT subchannels, and the receiving device maysoft-combine the transmissions together to identify the data intendedfor the receiving device. In some cases, the transmitting device may usea same HARQ ID for transmissions in different LBT subchannels in thesame slot. For downlink transmissions, a UE 115 may provide joint HARQfeedback in a single LBT subchannel for the downlink transmissionsacross the multiple LBT subchannels, or the UE 115 may provideindividual HARQ feedback in each LBT subchannel for a correspondingdownlink transmission in the LBT subchannel.

FIG. 4 illustrates an example of a process flow 400 in accordance withaspects of the present disclosure. Process flow 400 illustrates aspectsof techniques performed by a base station 105-b, which may be an exampleof a base station 105 described with reference to FIGS. 1-3. Processflow 400 also illustrates aspects of techniques performed by UE 115-b,which may be an example of a UE 115 described with reference to FIGS.1-3. Although the example described with reference to FIG. 4 relates toa downlink transmission from a base station 105-c to a UE 115-c, it isto be understood that the same or similar techniques may be applied foran uplink transmission from the UE 115-c to the base station 105-c.Further, although the example described with reference to FIG. 4 relatesto generating one or two duplicates of a data packet for transmission onmultiple subchannels, it is to be understood that any number ofduplicates of a data packet may be generated for transmission on anynumber of subchannels.

At 405, base station 105-c may transmit configuration signaling to UE115-c indicating a mapping of a first logical channel to a firstsubchannel (e.g., first LBT subchannel or first bandwidth part in ashared radio frequency spectrum) of a carrier and a second logicalchannel to a second subchannel (e.g., second LBT subchannel or secondbandwidth part in a shared radio frequency spectrum) of a carrier. Insome cases, the configuration signaling may also indicate a prohibitedsubchannel of the carrier. The mapping of logical channels tosubchannels may be used by UE 115-c for receiving a downlinktransmission using the techniques described herein (as shown) or fortransmitting an uplink transmission using the techniques describedherein (not shown).

At 410, base station 105-c may identify and duplicate a data packet fortransmission to UE 115-c. In particular, the base station 105-c maygenerate a data packet (e.g., a first data packet) for the first logicalchannel (e.g., a first PDCP PDU generated from an IP packet) and aduplicate of the data packet (e.g., a second data packet) for the secondlogical channel (e.g., a second PDCP PDU generated from the same IPpacket). In some cases, the base station 105 may generate anotherduplicate of the data packet (e.g., a third data packet) for a thirdlogical channel of the carrier (e.g., where the configuration signalingindicates a mapping of the third logical channel to a third subchannelof the carrier).

At 415, base station 105-c may perform a first LBT procedure on thefirst subchannel prior to transmitting the first data packet, and basestation 105-c may perform a second LBT procedure on the secondsubchannel prior to transmitting the second data packet. In some cases,base station 105-c may determine that the first and second subchannelsare clear (e.g., based on the LBT procedures), and, at 420, base station105-c may transmit the first data packet mapped to the first logicalchannel via the first subchannel, and the base station 105-c maytransmit the second data packet mapped to the second logical channel viathe second subchannel (e.g., based on the mapping of logical channels tosubchannels indicated by the configuration signaling at 405).

At 420, UE 115-c may receive the first data packet on the firstsubchannel, the second data packet on the second subchannel, or both thefirst and second data packets on the first and second subchannels, and,at 425, UE 115-c may process the first data packet, the second datapacket, or both. If UE 115-c receives both the first and second datapackets, UE 115-c may identify one of the data packets as a duplicate ofthe other (e.g., at a PDCP layer), and the UE 115-c may discard theduplicated data packet (e.g., at a PDCP layer). At 430, UE 115-c maythen provide HARQ feedback for the data packets. In one example, basestation 105-c may allocate PUCCH resources to UE 115-c on one or moresubchannels for UE 115-c to provide HARQ feedback to base station 105-c.In this example, UE 115-c may provide HARQ feedback on one or moresubchannels on which CCAs are successful.

FIG. 5 illustrates an example of a process flow 500 in accordance withaspects of the present disclosure. Process flow 500 illustrates aspectsof techniques performed by a base station 105-c, which may be an exampleof a base station 105 described with reference to FIGS. 1-4. Processflow 500 also illustrates aspects of techniques performed by UE 115-c,which may be an example of a UE 115 described with reference to FIGS.1-4. Although the example described with reference to FIG. 5 relates toa downlink transmission from a base station 105-d to a UE 115-d, it isto be understood that the same or similar techniques may be applied foran uplink transmission from the UE 115-d to the base station 105-d.Further, although the example described with reference to FIG. 5 relatesto transmitting on two subchannels, it is to be understood that awireless device may transmit on any number of subchannels using thesetechniques.

At 505, base station 105-d may transmit one or more grants to UE 115-dscheduling transmission of a data packet in a first subchannel and asecond subchannel of a carrier. At 510, base station 105-d may identifythe data packet (e.g., a PHY layer data packet processed and passed downto the PHY layer from upper layers) to be transmitted to UE 115-d. Inone example, base station 105-d may transmit a single grant to scheduletransmission of the data packet on multiple subchannels, and, at 515,base station 105-d may perform coding and rate matching to improve thereliability of transmission of the data packet. In this example, thebase station 105-d may use a low code for the transmission on eachsubchannel (e.g., a code rate equal to ⅓*the number of subchannels to beused to transmit the data packet) such that most or all of thesystematic bits of the data packet are transmitted on each LBTsubchannel.

Additionally, or alternatively, the base station 105-d may rate matchthe data packet across multiple subchannels such that the transmissionon each subchannel is self-decodable. For instance, base station 105-dmay rate match a first transmission of the data packet to generate arate matched first transmission based on a rate matching scheme (e.g.,signaled to UE 115-d in configuration signaling), and the base station105-d may rate match a second transmission of the data packet togenerate a rate matched second transmission based on the rate matchingscheme. In some cases, the rate matching scheme may indicate that therate matched first transmission includes a first redundancy versiongenerated from the data packet and at least a portion of a secondredundancy version generated from the data packet. Further, the ratematching scheme may indicate that the rate matched second transmissionincludes the first redundancy version generated from the first datapacket and at least a portion of a third redundancy version generatedfrom the first data packet, the second redundancy version differing fromthe third redundancy version.

In another example, base station 105-d may transmit multiple grants toschedule transmission of the data packet on multiple subchannels, and,at 520, base station 105-d may duplicate the data packet fortransmission on each of the multiple subchannels to improve thereliability of transmission of the data packet. Once the base station105-d performs coding and rate matching on the data packet to improvereliability (at 515) or the base station 105-d duplicates the datapacket to improve reliability, the base station 105-d may perform an LBTprocedure on each of the multiple subchannels to determine whether thesubchannels are available. At 525, the base station 105-d may thentransmit the one or more data packets on the multiple subchannels to UE115-d (if the channels are available). At 530, UE 115-d may receive thetransmission and process the one or more data packets to identify thedata intended for the UE 115-d.

If the data packet was coded using the techniques described herein andtransmitted on multiple subchannels to improve reliability, UE 115-d mayidentify a code rate used for coding the data packet (e.g., based onconfiguration signaling from base station 105-d that indicates thecoding rate), and UE 115-d may decode the transmission of the one ormore data packets based on the code rate to identify the data intendedfor the UE 115-d. If the data packet was rate matched using thetechniques described herein and transmitted on multiple subchannels toimprove reliability, UE 115-d may identify a rate matching scheme usedto rate match transmissions of the data packet (e.g., based onconfiguration signaling from base station 105-d that indicates the ratematching scheme), and UE 115-d may de-rate match the transmissions basedon the rate matching scheme used to rate match the transmissions toidentify the data intended for the UE 115-d.

For example, UE 115-d may de-rate match the first transmission togenerate a de-rate matched first transmission based on the rate matchingscheme, and UE 115-d may de-rate match the second transmission togenerate a de-rate matched second transmission based on the ratematching scheme. UE 115-d may then apply a decoding algorithm to thede-rate matched first transmission, the de-rate matched secondtransmission, or both. In some cases, the rate matching scheme mayindicate that the de-rate matched first transmission includes a firstredundancy version generated from the first data packet and at least aportion of a second redundancy version generated from the first datapacket. Further, the rate matching scheme may indicate that the de-ratematched second transmission includes the first redundancy version of thefirst data packet and at least a portion of a third redundancy versionof the first data packet, the second redundancy version differing fromthe third redundancy version.

If the data packet was duplicated using the techniques described hereinand transmitted on multiple subchannels to improve reliability, UE 115-dmay determine an association between a first transmission of the datapacket and a second transmission of the data packet based on individualgrants received for each transmission, and UE 115-d may soft combine thefirst transmission and the second transmission to decode the data packetbased on the association. In some cases, UE 115-d may identify a commonfeedback identifier for the first subchannel of the carrier and thesecond subchannel of the carrier within a same TTI, where the firsttransmission and the second transmission each correspond to the commonfeedback identifier.

At 535, the UE 115-d may then provide HARQ feedback to base station105-d for the one or more data packets. In some cases, if differentgrants are used to schedule a first transmission of a data packet on afirst subchannel and a second transmission of the same data packetsecond subchannel, UE 115-d may transmit a joint feedback message viathe first subchannel, the second subchannel, or both, to provide jointfeedback on the first transmission and the second transmission.Alternatively, UE 115-d may transmit a first feedback message via thefirst subchannel of the carrier to provide feedback on the firsttransmission and a second feedback message via the second subchannel ofthe carrier to provide feedback on the second transmission. In othercases, if a same grant is used to schedule transmissions of a datapacket on multiple subchannels, base station 105-d may transmitconfiguration signaling indicating at least one feedback resource forthe first subchannel, the second subchannel, or both, and UE 115-d maytransmit a feedback message via the at least one feedback resource(e.g., depending on whether CCA is successful on a subchannel).

FIG. 6 shows a block diagram 600 of a device 605 in accordance withaspects of the present disclosure. The device 605 may be an example ofaspects of a UE 115 as described herein. The device 605 may include areceiver 610, a communications manager 615, and a transmitter 620. Thedevice 605 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 610 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to packetduplication for high reliability communication, etc.). Information maybe passed on to other components of the device 605. The receiver 610 maybe an example of aspects of the transceiver 920 described with referenceto FIG. 9. The receiver 610 may utilize a single antenna or a set ofantennas.

The communications manager 615 may receive configuration signalingindicating a mapping of a first logical channel to a first subchannel ofa carrier and a second logical channel to a second subchannel of thecarrier and transmit or receiving a transmission of a first data packetvia the first subchannel of the carrier and a duplicate of thetransmission associated with the second logical channel via the secondsubchannel of the carrier based on the mapping. The communicationsmanager 615 may also receive one or more grants scheduling transmissionof a first data packet in a first subchannel and a second subchannel ofa carrier and transmit or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based on the one ormore grants. The communications manager 615 may be an example of aspectsof the communications manager 910 described herein.

The actions performed by the communications manager 615 as describedherein may be implemented to realize one or more potential advantages.One implementation may allow device 605 to transmit multiple versions(e.g., same or different versions) of the same high reliability packeton multiple LBT subchannels to increase the chances that the highreliability packet is received by a receiving device. In thisimplementation, the receiving device (e.g., which may, in some examples,be device 605) may receive the high reliability packet on the multipleLBT subchannels. In some cases, the device 605 may also process a highreliability packet for transmission such that each high reliabilitypacket transmitted on an LBT subchannel is self-decodable. Accordingly,if a receiving device fails to receive a high reliability packet on onesubchannel, the receiving device may receive a duplicate of the highreliability packet on another subchannel and be able to decode toduplicate of the high reliability packet. In such cases, a processor atthe receiving device may efficiently use its processing power to decodehigh reliability packets received from another device on one or more LBTsubchannels.

The communications manager 615, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 615, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a field-programmablegate array (FPGA) or other programmable logic device, discrete gate ortransistor logic, discrete hardware components, or any combinationthereof designed to perform the functions described in the presentdisclosure.

The communications manager 615, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 615, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 615, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 620 may transmit signals generated by other componentsof the device 605. In some examples, the transmitter 620 may becollocated with a receiver 610 in a transceiver module. For example, thetransmitter 620 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The transmitter 620 may utilize asingle antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a device 705 in accordance withaspects of the present disclosure. The device 705 may be an example ofaspects of a device 605, or a UE 115 as described herein. The device 705may include a receiver 710, a communications manager 715, and atransmitter 735. The device 705 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 710 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to packetduplication for high reliability communication, etc.). Information maybe passed on to other components of the device 705. The receiver 710 maybe an example of aspects of the transceiver 920 described with referenceto FIG. 9. The receiver 710 may utilize a single antenna or a set ofantennas.

The communications manager 715 may be an example of aspects of thecommunications manager 615 as described herein. The communicationsmanager 715 may include a configuration signaling manager 720, a packetmanager 725, and a grant manager 730. The communications manager 715 maybe an example of aspects of the communications manager 910 describedherein.

The configuration signaling manager 720 may receive configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier. The packet manager 725 may transmit orreceiving a transmission of a first data packet via the first subchannelof the carrier and a duplicate of the transmission associated with thesecond logical channel via the second subchannel of the carrier based onthe mapping. The grant manager 730 may receive one or more grantsscheduling transmission of a first data packet in a first subchannel anda second subchannel of a carrier. The packet manager 725 may transmit orreceiving the transmission via the first subchannel and the secondsubchannel of the carrier based on the one or more grants.

The transmitter 735 may transmit signals generated by other componentsof the device 705. In some examples, the transmitter 735 may becollocated with a receiver 710 in a transceiver module. For example, thetransmitter 735 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The transmitter 735 may utilize asingle antenna or a set of antennas.

FIG. 8 shows a block diagram 800 of a communications manager 805 inaccordance with aspects of the present disclosure. The communicationsmanager 805 may be an example of aspects of a communications manager615, a communications manager 715, or a communications manager 910described herein. The communications manager 805 may include aconfiguration signaling manager 810, a packet manager 815, a LBT manager820, a grant manager 825, a rate matching manager 830, a decoder 835,and a HARQ manager 840. Each of these modules may communicate, directlyor indirectly, with one another (e.g., via one or more buses).

The configuration signaling manager 810 may receive configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier. In some examples, the configuration signalingmanager 810 may receive the configuration signaling indicating aprohibited subchannel of the carrier. In some examples, theconfiguration signaling manager 810 may receive configuration signalingindicating a rate matching scheme. In some examples, the configurationsignaling manager 810 may receive configuration signaling indicating acode rate.

In some examples, the configuration signaling manager 810 may receiveconfiguration signaling indicating at least one feedback resource forthe first subchannel, the second subchannel, or both. In some cases,each of the first subchannel and the second subchannel is a differentlisten before talk subchannel of the carrier. In some cases, each of thefirst subchannel and the second subchannel is a different bandwidth partof the carrier. In some cases, the first logical channel is associatedwith a first channel identifier that differs from a second channelidentifier of the second logical channel. In some cases, the code rateis smaller than ⅓ a number of subchannels to which transmissions of thefirst data packet are mapped.

The packet manager 815 may transmit or receiving a transmission of afirst data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping. In someexamples, the packet manager 815 may transmit or receiving thetransmission via the first subchannel and the second subchannel of thecarrier based on the one or more grants. In some examples, generating afirst data packet for the first logical channel and a duplicate firstdata packet for the second logical channel, where the transmitting orreceiving further includes.

In some examples, the packet manager 815 may transmit or receiving asecond duplicate of the transmission via the third subchannel of thecarrier based on the second mapping. In some examples, the packetmanager 815 may receive a first transmission of the first data packetvia the first subchannel of the carrier and a second transmission of thefirst data packet via the second subchannel of the carrier. In someexamples, the packet manager 815 may transmit the rate matched firsttransmission via the first subchannel of the carrier and the ratematched second transmission via the second subchannel of the carrier. Insome examples, the packet manager 815 may generate the first data packetto include a duplication tag.

In some examples, generating a first transmission including the firstpacket and a second transmission including the first data packet basedon the duplication tag, where the transmitting or receiving furtherincludes. In some examples, the packet manager 815 may receive a firsttransmission of the first data packet via the first subchannel of thecarrier and a second transmission of the first data packet via thesecond subchannel of the carrier, where each of the first transmissionand the second transmission is self-decodable. In some cases, the firstdata packet is a PDCP packet. In some cases, the first data packet is aMAC-SDU. In some cases, the first data packet is a PDCP packet.

The grant manager 825 may receive one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier. In some examples, the grant manager 825 mayreceive a first grant scheduling a first transmission of the first datapacket via the first subchannel of the carrier and a second grantscheduling a second transmission of the first data packet via the secondsubchannel of the carrier. In some cases, each of the first subchanneland the second subchannel is a different listen before talk subchannelof the carrier. In some cases, each of the first subchannel and thesecond subchannel is a different bandwidth part of the carrier.

The LBT manager 820 may perform a first listen before talk procedure onthe first subchannel prior to transmitting the transmission. In someexamples, the LBT manager 820 may perform a second listen before talkprocedure on the second subchannel prior to transmitting the duplicateof the transmission.

The rate matching manager 830 may de-rate matching the firsttransmission to generate a de-rate matched first transmission based onthe rate matching scheme. In some examples, the rate matching manager830 may de-rate matching the second transmission to generate a de-ratematched second transmission based on the rate matching scheme. In someexamples, the rate matching manager 830 may rate matching a firsttransmission of the first data packet to generate a rate matched firsttransmission based on the rate matching scheme. In some examples, therate matching manager 830 may rate matching a second transmission of thefirst data packet to generate a rate matched second transmission basedon the rate matching scheme.

In some cases, the rate matching scheme indicates that the de-ratematched first transmission includes a first redundancy version generatedfrom the first data packet and at least a portion of a second redundancyversion generated from the first data packet. In some cases, the ratematching scheme indicates that the de-rate matched second transmissionincludes the first redundancy version of the first data packet and atleast a portion of a third redundancy version of the first data packet,the second redundancy version differing from the third redundancyversion. In some cases, the rate matching scheme indicates that the ratematched first transmission includes a first redundancy version generatedfrom the first data packet and at least a portion of a second redundancyversion generated from the first data packet. In some cases, the ratematching scheme indicates that the rate matched second transmissionincludes the first redundancy version generated from the first datapacket and at least a portion of a third redundancy version generatedfrom the first data packet, the second redundancy version differing fromthe third redundancy version.

The decoder 835 may apply a decoding algorithm to the de-rate matchedfirst transmission, the de-rate matched second transmission, or both. Insome examples, the decoder 835 may decode the transmission based on thecode rate. In some examples, the decoder 835 may determine anassociation between the first transmission and the second transmissionbased on the first grant and the second grant. In some examples, thedecoder 835 may soft combine the first transmission and the secondtransmission to decode the first data packet based on the association.

The HARQ manager 840 may identify a common feedback identifier for thefirst subchannel of the carrier and the second subchannel of the carrierwithin a same transmission time interval, where the first transmissionand the second transmission each correspond to the common feedbackidentifier. In some examples, the HARQ manager 840 may transmit a jointfeedback message via the first subchannel, the second subchannel, orboth, to provide joint feedback on the first transmission and the secondtransmission.

In some examples, the HARQ manager 840 may transmit a first feedbackmessage via the first subchannel of the carrier to provide feedback onthe first transmission and a second feedback message via the secondsubchannel of the carrier to provide feedback on the secondtransmission. In some examples, the HARQ manager 840 may transmit, viathe at least one feedback resource, a feedback message. In someexamples, the HARQ manager 840 may receive a first transmission of thefirst data packet via the first subchannel of the carrier and a secondtransmission of the first data packet via the second subchannel of thecarrier, where the feedback message is a joint feedback message thatprovides feedback for the first transmission and the secondtransmission.

FIG. 9 shows a diagram of a system 900 including a device 905 inaccordance with aspects of the present disclosure. The device 905 may bean example of or include the components of device 605, device 705, or aUE 115 as described herein. The device 905 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, including a communicationsmanager 910, an I/O controller 915, a transceiver 920, an antenna 925,memory 930, and a processor 940. These components may be in electroniccommunication via one or more buses (e.g., bus 945).

The communications manager 910 may receive configuration signalingindicating a mapping of a first logical channel to a first subchannel ofa carrier and a second logical channel to a second subchannel of thecarrier and transmit or receiving a transmission of a first data packetvia the first subchannel of the carrier and a duplicate of thetransmission associated with the second logical channel via the secondsubchannel of the carrier based on the mapping. The communicationsmanager 910 may also receive one or more grants scheduling transmissionof a first data packet in a first subchannel and a second subchannel ofa carrier and transmit or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based on the one ormore grants.

The I/O controller 915 may manage input and output signals for thedevice 905. The I/O controller 915 may also manage peripherals notintegrated into the device 905. In some cases, the I/O controller 915may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 915 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 915may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 915may be implemented as part of a processor. In some cases, a user mayinteract with the device 905 via the I/O controller 915 or via hardwarecomponents controlled by the I/O controller 915.

The transceiver 920 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described herein. For example, thetransceiver 920 may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 920may also include a modem to modulate the packets and provide themodulated packets to the antennas for transmission, and to demodulatepackets received from the antennas.

In some cases, the wireless device may include a single antenna 925.However, in some cases the device may have more than one antenna 925,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 930 may include random-access memory (RAM) and read-onlymemory (ROM). The memory 930 may store computer-readable,computer-executable code 935 including instructions that, when executed,cause the processor to perform various functions described herein. Insome cases, the memory 930 may contain, among other things, a basicinput/output system (BIOS) which may control basic hardware or softwareoperation such as the interaction with peripheral components or devices.

The processor 940 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 940 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 940. The processor 940 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 930) to cause the device 905 to perform variousfunctions (e.g., functions or tasks supporting packet duplication forhigh reliability communication).

The code 935 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 935 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 935 may not be directly executable by theprocessor 940 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 10 shows a block diagram 1000 of a device 1005 in accordance withaspects of the present disclosure. The device 1005 may be an example ofaspects of a base station 105 as described herein. The device 1005 mayinclude a receiver 1010, a communications manager 1015, and atransmitter 1020. The device 1005 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 1010 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to packetduplication for high reliability communication, etc.). Information maybe passed on to other components of the device 1005. The receiver 1010may be an example of aspects of the transceiver 1320 described withreference to FIG. 13. The receiver 1010 may utilize a single antenna ora set of antennas.

The communications manager 1015 may transmit configuration signalingindicating a mapping of a first logical channel to a first subchannel ofa carrier and a second logical channel to a second subchannel of thecarrier and transmit or receiving a transmission of a first data packetvia the first subchannel of the carrier and a duplicate of thetransmission associated with the second logical channel via the secondsubchannel of the carrier based on the mapping. The communicationsmanager 1015 may also transmit one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier and transmit or receiving the transmission viathe first subchannel and the second subchannel of the carrier based onthe one or more grants. The communications manager 1015 may be anexample of aspects of the communications manager 1310 described herein.

The actions performed by the communications manager 1015 as describedherein may be implemented to realize one or more potential advantages.One implementation may allow device 1005 to transmit multiple versions(e.g., same or different versions) of the same high reliability packeton multiple LBT subchannels to increase the chances that the highreliability packet is received by a receiving device. In thisimplementation, the receiving device (e.g., which may, in some examples,be device 1005) may receive the high reliability packet on the multipleLBT subchannels. In some cases, the device 1005 may also process a highreliability packet for transmission such that each high reliabilitypacket transmitted on an LBT subchannel is self-decodable. Accordingly,if a receiving device fails to receive a high reliability packet on onesubchannel, the receiving device may receive a duplicate of the highreliability packet on another subchannel and be able to decode toduplicate of the high reliability packet. In such cases, a processor atthe receiving device may efficiently use its processing power to decodehigh reliability packets received from another device on one or more LBTsubchannels.

The communications manager 1015, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 1015, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The communications manager 1015, or its sub-components, may bephysically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations by one or more physical components. In some examples, thecommunications manager 1015, or its sub-components, may be a separateand distinct component in accordance with various aspects of the presentdisclosure. In some examples, the communications manager 1015, or itssub-components, may be combined with one or more other hardwarecomponents, including but not limited to an input/output (I/O)component, a transceiver, a network server, another computing device,one or more other components described in the present disclosure, or acombination thereof in accordance with various aspects of the presentdisclosure.

The transmitter 1020 may transmit signals generated by other componentsof the device 1005. In some examples, the transmitter 1020 may becollocated with a receiver 1010 in a transceiver module. For example,the transmitter 1020 may be an example of aspects of the transceiver1320 described with reference to FIG. 13. The transmitter 1020 mayutilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a device 1105 in accordance withaspects of the present disclosure. The device 1105 may be an example ofaspects of a device 1005, or a base station 105 as described herein. Thedevice 1105 may include a receiver 1110, a communications manager 1115,and a transmitter 1135. The device 1105 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 1110 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to packetduplication for high reliability communication, etc.). Information maybe passed on to other components of the device 1105. The receiver 1110may be an example of aspects of the transceiver 1320 described withreference to FIG. 13. The receiver 1110 may utilize a single antenna ora set of antennas.

The communications manager 1115 may be an example of aspects of thecommunications manager 1015 as described herein. The communicationsmanager 1115 may include a configuration signaling manager 1120, apacket manager 1125, and a grant manager 1130. The communicationsmanager 1115 may be an example of aspects of the communications manager1310 described herein.

The configuration signaling manager 1120 may transmit configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier. The packet manager 1125 may transmit orreceiving a transmission of a first data packet via the first subchannelof the carrier and a duplicate of the transmission associated with thesecond logical channel via the second subchannel of the carrier based onthe mapping. The grant manager 1130 may transmit one or more grantsscheduling transmission of a first data packet in a first subchannel anda second subchannel of a carrier. The packet manager 1125 may transmitor receiving the transmission via the first subchannel and the secondsubchannel of the carrier based on the one or more grants.

The transmitter 1135 may transmit signals generated by other componentsof the device 1105. In some examples, the transmitter 1135 may becollocated with a receiver 1110 in a transceiver module. For example,the transmitter 1135 may be an example of aspects of the transceiver1320 described with reference to FIG. 13. The transmitter 1135 mayutilize a single antenna or a set of antennas.

FIG. 12 shows a block diagram 1200 of a communications manager 1205 inaccordance with aspects of the present disclosure. The communicationsmanager 1205 may be an example of aspects of a communications manager1015, a communications manager 1115, or a communications manager 1310described herein. The communications manager 1205 may include aconfiguration signaling manager 1210, a packet manager 1215, a LBTmanager 1220, a grant manager 1225, a rate matching manager 1230, adecoder 1235, and a HARQ manager 1240. Each of these modules maycommunicate, directly or indirectly, with one another (e.g., via one ormore buses).

The configuration signaling manager 1210 may transmit configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier. In some examples, the configuration signalingmanager 1210 may transmit the configuration signaling indicating aprohibited subchannel of the carrier. In some examples, theconfiguration signaling manager 1210 may transmit configurationsignaling indicating a rate matching scheme. In some examples, theconfiguration signaling manager 1210 may transmit configurationsignaling indicating a code rate. In some examples, the configurationsignaling manager 1210 may transmit configuration signaling indicatingat least one feedback resource for the first subchannel, the secondsubchannel, or both.

In some cases, each of the first subchannel and the second subchannel isa different listen before talk subchannel of the carrier. In some cases,each of the first subchannel and the second subchannel is a differentbandwidth part of the carrier. In some cases, the first logical channelis associated with a first channel identifier that differs from a secondchannel identifier of the second logical channel. In some cases, thecode rate is smaller than ⅓ of a number of subchannels to whichtransmissions of the first data packet are mapped. In some cases, eachof the first subchannel and the second subchannel is a different listenbefore talk subchannel of the carrier. In some cases, each of the firstsubchannel and the second subchannel is a different bandwidth part ofthe carrier.

The packet manager 1215 may transmit or receiving a transmission of afirst data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping. In someexamples, the packet manager 1215 may transmit or receiving thetransmission via the first subchannel and the second subchannel of thecarrier based on the one or more grants. In some examples, generating afirst data packet for the first logical channel and a duplicate firstdata packet for the second logical channel, where the transmitting orreceiving further includes.

In some examples, the packet manager 1215 may transmit or receiving asecond duplicate of the transmission via the third subchannel of thecarrier based on the second mapping. In some examples, the packetmanager 1215 may receive a first transmission of the first data packetvia the first subchannel of the carrier and a second transmission of thefirst data packet via the second subchannel of the carrier. In someexamples, the packet manager 1215 may transmit the rate matched firsttransmission via the first subchannel of the carrier and the ratematched second transmission via the second subchannel of the carrier. Insome examples, the packet manager 1215 may generate the first datapacket to include a duplication tag. In some examples, generating afirst transmission including the first packet and a second transmissionincluding the first data packet based on the duplication tag, where thetransmitting or receiving further includes.

In some examples, the packet manager 1215 may transmit a firsttransmission of the first data packet via the first subchannel of thecarrier and a second transmission of the first data packet via thesecond subchannel of the carrier, where each of the first transmissionand the second transmission is self-decodable. In some cases, the firstdata packet is a PDCP packet. In some cases, the first data packet is aMAC-SDU. In some cases, the first data packet is a PDCP packet. Thegrant manager 1225 may transmit one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier. In some examples, the grant manager 1225 maytransmit a first grant scheduling a first transmission of the first datapacket via the first subchannel of the carrier and a second grantscheduling a second transmission of the first data packet via the secondsubchannel of the carrier.

The LBT manager 1220 may perform a listen before talk procedure on eachof the each of the first subchannel and the second subchannel prior totransmitting the transmission and the duplicate of the transmission. Therate matching manager 1230 may de-rate matching the first transmissionto generate a de-rate matched first transmission based on the ratematching scheme. In some examples, the rate matching manager 1230 mayde-rate matching the second transmission to generate a de-rate matchedsecond transmission based on the rate matching scheme. In some examples,the rate matching manager 1230 may rate matching a first transmission ofthe first data packet to generate a rate matched first transmissionbased on the rate matching scheme. In some examples, the rate matchingmanager 1230 may rate matching a second transmission of the first datapacket to generate a rate matched second transmission based on the ratematching scheme.

In some cases, the rate matching scheme indicates that the de-ratematched first transmission includes a first redundancy version generatedfrom the first data packet and at least a portion of a second redundancyversion generated from the first data packet. In some cases, the ratematching scheme indicates that the de-rate matched second transmissionincludes the first redundancy version of the first data packet and atleast a portion of a third redundancy version of the first data packet,the second redundancy version differing from the third redundancyversion. In some cases, the rate matching scheme indicates that the ratematched first transmission includes a first redundancy version generatedfrom the first data packet and at least a portion of a second redundancyversion generated from the first data packet. In some cases, the ratematching scheme indicates that the rate matched second transmissionincludes the first redundancy version generated from the first datapacket and at least a portion of a third redundancy version generatedfrom the first data packet, the second redundancy version differing fromthe third redundancy version.

The decoder 1235 may apply a decoding algorithm to the de-rate matchedfirst transmission, the de-rate matched second transmission, or both. Insome examples, the decoder 1235 may decode the transmission based on thecode rate. In some examples, the decoder 1235 may determine anassociation between the first transmission and the second transmissionbased on the first grant and the second grant. In some examples, thedecoder 1235 may soft combine the first transmission and the secondtransmission to decode the first data packet based on the association.

The HARQ manager 1240 may identify a common feedback identifier for thefirst subchannel of the carrier and the second subchannel of the carrierwithin a same transmission time interval, where the first transmissionand the second transmission each correspond to the common feedbackidentifier. In some examples, the HARQ manager 1240 may receive a jointfeedback message via the first subchannel, the second subchannel, orboth, that provides joint feedback on the first transmission and thesecond transmission.

In some examples, the HARQ manager 1240 may receive a first feedbackmessage via the first subchannel of the carrier that provides feedbackon the first transmission and a second feedback message via the secondsubchannel of the carrier that provides feedback on the secondtransmission. In some examples, the HARQ manager 1240 may receive, viathe at least one feedback resource, a feedback message. In someexamples, the HARQ manager 1240 may transmit a first transmission of thefirst data packet via the first subchannel of the carrier and a secondtransmission of the first data packet via the second subchannel of thecarrier, where the feedback message is a joint feedback message thatprovides feedback for the first transmission and the secondtransmission.

FIG. 13 shows a diagram of a system 1300 including a device 1305 inaccordance with aspects of the present disclosure. The device 1305 maybe an example of or include the components of device 1005, device 1105,or a base station 105 as described herein. The device 1305 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 1310, a network communications manager 1315, atransceiver 1320, an antenna 1325, memory 1330, a processor 1340, and aninter-station communications manager 1345. These components may be inelectronic communication via one or more buses (e.g., bus 1350).

The communications manager 1310 may transmit configuration signalingindicating a mapping of a first logical channel to a first subchannel ofa carrier and a second logical channel to a second subchannel of thecarrier and transmit or receiving a transmission of a first data packetvia the first subchannel of the carrier and a duplicate of thetransmission associated with the second logical channel via the secondsubchannel of the carrier based on the mapping. The communicationsmanager 1310 may also transmit one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier and transmit or receiving the transmission viathe first subchannel and the second subchannel of the carrier based onthe one or more grants.

The network communications manager 1315 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1315 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1320 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described herein. For example, thetransceiver 1320 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1320 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1325.However, in some cases the device may have more than one antenna 1325,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1330 may include RAM, ROM, or a combination thereof. Thememory 1330 may store computer-readable code 1335 including instructionsthat, when executed by a processor (e.g., the processor 1340) cause thedevice to perform various functions described herein. In some cases, thememory 1330 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1340 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1340 may be configured to operate a memoryarray using a memory controller. In some cases, a memory controller maybe integrated into processor 1340. The processor 1340 may be configuredto execute computer-readable instructions stored in a memory (e.g., thememory 1330) to cause the device 1305 to perform various functions(e.g., functions or tasks supporting packet duplication for highreliability communication).

The inter-station communications manager 1345 may manage communicationswith other base station 105 and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1345 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1345 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1335 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1335 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1335 may not be directly executable by theprocessor 1340 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 14 shows a flowchart illustrating a method 1400 in accordance withaspects of the present disclosure. The operations of method 1400 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1400 may be performed by acommunications manager as described with reference to FIGS. 6 through 9.In some examples, a UE may execute a set of instructions to control thefunctional elements of the UE to perform the functions described herein.Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1405, the UE may receive configuration signaling indicating a mappingof a first logical channel to a first subchannel of a carrier and asecond logical channel to a second subchannel of the carrier. Theoperations of 1405 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1405 may beperformed by a configuration signaling manager as described withreference to FIGS. 6 through 9.

At 1410, the UE may transmit or receiving a transmission of a first datapacket via the first subchannel of the carrier and a duplicate of thetransmission associated with the second logical channel via the secondsubchannel of the carrier based on the mapping. The operations of 1410may be performed according to the methods described herein. In someexamples, aspects of the operations of 1410 may be performed by a packetmanager as described with reference to FIGS. 6 through 9.

FIG. 15 shows a flowchart illustrating a method 1500 in accordance withaspects of the present disclosure. The operations of method 1500 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1500 may be performed by acommunications manager as described with reference to FIGS. 6 through 9.In some examples, a UE may execute a set of instructions to control thefunctional elements of the UE to perform the functions described herein.Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1505, the UE may receive one or more grants scheduling transmissionof a first data packet in a first subchannel and a second subchannel ofa carrier. The operations of 1505 may be performed according to themethods described herein. In some examples, aspects of the operations of1505 may be performed by a grant manager as described with reference toFIGS. 6 through 9.

At 1510, the UE may transmit or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based on the one ormore grants. The operations of 1510 may be performed according to themethods described herein. In some examples, aspects of the operations of1510 may be performed by a packet manager as described with reference toFIGS. 6 through 9.

FIG. 16 shows a flowchart illustrating a method 1600 in accordance withaspects of the present disclosure. The operations of method 1600 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 1600 may be performed by acommunications manager as described with reference to FIGS. 10 through13. In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described herein. Additionally, or alternatively, a basestation may perform aspects of the functions described herein usingspecial-purpose hardware.

At 1605, the base station may transmit configuration signalingindicating a mapping of a first logical channel to a first subchannel ofa carrier and a second logical channel to a second subchannel of thecarrier. The operations of 1605 may be performed according to themethods described herein. In some examples, aspects of the operations of1605 may be performed by a configuration signaling manager as describedwith reference to FIGS. 10 through 13.

At 1610, the base station may transmit or receiving a transmission of afirst data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based on the mapping. Theoperations of 1610 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1610 may beperformed by a packet manager as described with reference to FIGS. 10through 13.

FIG. 17 shows a flowchart illustrating a method 1700 in accordance withaspects of the present disclosure. The operations of method 1700 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 1700 may be performed by acommunications manager as described with reference to FIGS. 10 through13. In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described herein. Additionally, or alternatively, a basestation may perform aspects of the functions described herein usingspecial-purpose hardware.

At 1705, the base station may transmit one or more grants schedulingtransmission of a first data packet in a first subchannel and a secondsubchannel of a carrier. The operations of 1705 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1705 may be performed by a grant manager as describedwith reference to FIGS. 10 through 13.

At 1710, the base station may transmit or receiving the transmission viathe first subchannel and the second subchannel of the carrier based onthe one or more grants. The operations of 1710 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1710 may be performed by a packet manager as describedwith reference to FIGS. 10 through 13.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wirelesscommunications systems such as code division multiple access (CDMA),time division multiple access (TDMA), frequency division multiple access(FDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and other systems.A CDMA system may implement a radio technology such as CDMA2000,Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000,IS-95, and IS-856 standards. IS-2000 Releases may be commonly referredto as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to asCDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. A TDMA system mayimplement a radio technology such as Global System for MobileCommunications (GSM).

An OFDMA system may implement a radio technology such as Ultra MobileBroadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical andElectronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal MobileTelecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releasesof UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR,and GSM are described in documents from the organization named “3rdGeneration Partnership Project” (3GPP). CDMA2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). The techniques described herein may be used for thesystems and radio technologies mentioned herein as well as other systemsand radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NRsystem may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, thetechniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro,or NR applications.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEswith service subscriptions with the network provider. A small cell maybe associated with a lower-powered base station, as compared with amacro cell, and a small cell may operate in the same or different (e.g.,licensed, unlicensed, etc.) frequency bands as macro cells. Small cellsmay include pico cells, femto cells, and micro cells according tovarious examples. A pico cell, for example, may cover a small geographicarea and may allow unrestricted access by UEs with service subscriptionswith the network provider. A femto cell may also cover a smallgeographic area (e.g., a home) and may provide restricted access by UEshaving an association with the femto cell (e.g., UEs in a closedsubscriber group (CSG), UEs for users in the home, and the like). An eNBfor a macro cell may be referred to as a macro eNB. An eNB for a smallcell may be referred to as a small cell eNB, a pico eNB, a femto eNB, ora home eNB. An eNB may support one or multiple (e.g., two, three, four,and the like) cells, and may also support communications using one ormultiple component carriers.

The wireless communications systems described herein may supportsynchronous or asynchronous operation. For synchronous operation, thebase stations may have similar frame timing, and transmissions fromdifferent base stations may be approximately aligned in time. Forasynchronous operation, the base stations may have different frametiming, and transmissions from different base stations may not bealigned in time. The techniques described herein may be used for eithersynchronous or asynchronous operations.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, an FPGA, or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyconventional processor, controller, microcontroller, or state machine. Aprocessor may also be implemented as a combination of computing devices(e.g., a combination of a digital signal processor (DSP) and amicroprocessor, multiple microprocessors, one or more microprocessors inconjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable ROM (EEPROM), flashmemory, compact disk (CD) ROM or other optical disk storage, magneticdisk storage or other magnetic storage devices, or any othernon-transitory medium that can be used to carry or store desired programcode means in the form of instructions or data structures and that canbe accessed by a general-purpose or special-purpose computer, or ageneral-purpose or special-purpose processor. Also, any connection isproperly termed a computer-readable medium. For example, if the softwareis transmitted from a website, server, or other remote source using acoaxial cable, fiber optic cable, twisted pair, digital subscriber line(DSL), or wireless technologies such as infrared, radio, and microwave,then the coaxial cable, fiber optic cable, twisted pair, DSL, orwireless technologies such as infrared, radio, and microwave areincluded in the definition of medium. Disk and disc, as used herein,include CD, laser disc, optical disc, digital versatile disc (DVD),floppy disk and Blu-ray disc where disks usually reproduce datamagnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an exemplary step that is described as “based on conditionA” may be based on both a condition A and a condition B withoutdeparting from the scope of the present disclosure. In other words, asused herein, the phrase “based on” shall be construed in the same manneras the phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “exemplary” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, well-known structures and devices are shownin block diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notlimited to the examples and designs described herein, but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

What is claimed is:
 1. A method for wireless communication by a userequipment, comprising: receiving configuration signaling indicating amapping of a first logical channel to a first subchannel of a carrierand a second logical channel to a second subchannel of the carrier; andtransmitting or receiving a transmission of a first data packet via thefirst subchannel of the carrier and a duplicate of the transmissionassociated with the second logical channel via the second subchannel ofthe carrier based at least in part on the mapping.
 2. The method ofclaim 1, further comprising: generating the first data packet for thefirst logical channel and a duplicate first data packet for the secondlogical channel, wherein the transmitting or receiving furthercomprises: transmitting the transmission comprising the first datapacket via the first subchannel of the carrier and the duplicate of thetransmission comprising the duplicate first data packet via the secondsubchannel of the carrier.
 3. The method of claim 1, wherein the mappingindicates a second mapping of a third logical channel to a thirdsubchannel of the carrier, and wherein the method further comprises:transmitting or receiving a second duplicate of the transmission via thethird subchannel of the carrier based at least in part on the secondmapping.
 4. The method of claim 1, wherein receiving the configurationsignaling further comprises: receiving the configuration signalingindicating a prohibited subchannel of the carrier.
 5. The method ofclaim 1, wherein the transmitting or receiving further comprises:performing a first listen before talk procedure on the first subchannelprior to transmitting the transmission; and performing a second listenbefore talk procedure on the second subchannel prior to transmitting theduplicate of the transmission.
 6. The method of claim 1, wherein each ofthe first subchannel and the second subchannel is a different listenbefore talk subchannel of the carrier.
 7. The method of claim 1, whereinthe first logical channel is associated with a first channel identifierthat differs from a second channel identifier of the second logicalchannel.
 8. The method of claim 1, wherein the first data packet is apacket data convergence protocol (PDCP) packet.
 9. A method for wirelesscommunication by a user equipment, comprising: receiving one or moregrants scheduling transmission of a first data packet in a firstsubchannel and a second subchannel of a carrier; and transmitting orreceiving the transmission via the first subchannel and the secondsubchannel of the carrier based at least in part on the one or moregrants.
 10. The method of claim 9, further comprising: receivingconfiguration signaling indicating a rate matching scheme.
 11. Themethod of claim 10, wherein the transmitting or receiving furthercomprises: receiving a first transmission of the first data packet viathe first subchannel of the carrier and a second transmission of thefirst data packet via the second subchannel of the carrier; de-ratematching the first transmission to generate a de-rate matched firsttransmission based at least in part on the rate matching scheme; de-ratematching the second transmission to generate a de-rate matched secondtransmission based at least in part on the rate matching scheme; andapplying a decoding algorithm to the de-rate matched first transmission,the de-rate matched second transmission, or both.
 12. The method ofclaim 11, wherein the rate matching scheme indicates that the de-ratematched first transmission includes a first redundancy version generatedfrom the first data packet and at least a portion of a second redundancyversion generated from the first data packet.
 13. The method of claim10, wherein the transmitting or receiving further comprises: ratematching a first transmission of the first data packet to generate arate matched first transmission based at least in part on the ratematching scheme; rate matching a second transmission of the first datapacket to generate a rate matched second transmission based at least inpart on the rate matching scheme; and transmitting the rate matchedfirst transmission via the first subchannel of the carrier and the ratematched second transmission via the second subchannel of the carrier.14. The method of claim 13, wherein the rate matching scheme indicatesthat the rate matched first transmission includes a first redundancyversion generated from the first data packet and at least a portion of asecond redundancy version generated from the first data packet.
 15. Themethod of claim 9, further comprising: receiving configuration signalingindicating a code rate; and decoding the transmission based at least inpart on the code rate.
 16. The method of claim 9, wherein receiving theone or more grants further comprises: receiving a first grant schedulinga first transmission of the first data packet via the first subchannelof the carrier and a second grant scheduling a second transmission ofthe first data packet via the second subchannel of the carrier.
 17. Themethod of claim 16, further comprising: determining an associationbetween the first transmission and the second transmission based atleast in part on the first grant and the second grant; and softcombining the first transmission and the second transmission to decodethe first data packet based at least in part on the association.
 18. Themethod of claim 17, wherein determining the association furthercomprises: identifying a common feedback identifier for the firstsubchannel of the carrier and the second subchannel of the carrierwithin a same transmission time interval, wherein the first transmissionand the second transmission each correspond to the common feedbackidentifier.
 19. The method of claim 16, further comprising: transmittinga joint feedback message via the first subchannel, the secondsubchannel, or both, to provide joint feedback on the first transmissionand the second transmission.
 20. The method of claim 16, furthercomprising: transmitting a first feedback message via the firstsubchannel of the carrier to provide feedback on the first transmissionand a second feedback message via the second subchannel of the carrierto provide feedback on the second transmission.
 21. The method of claim9, further comprising: generating the first data packet to include aduplication tag; generating a first transmission comprising the firstdata packet and a second transmission comprising the first data packetbased at least in part on the duplication tag, wherein the transmittingor receiving further comprises; and transmitting the first transmissionvia the first subchannel of the carrier and the second transmission viathe second subchannel of the carrier.
 22. The method of claim 21,wherein the first data packet is a medium access control service dataunit (MAC-SDU).
 23. The method of claim 9, further comprising: receivingconfiguration signaling indicating at least one feedback resource forthe first subchannel, the second subchannel, or both; and transmitting,via the at least one feedback resource, a feedback message.
 24. Themethod of claim 23, wherein the transmitting or receiving furthercomprises: receiving a first transmission of the first data packet viathe first subchannel of the carrier and a second transmission of thefirst data packet via the second subchannel of the carrier, wherein thefeedback message is a joint feedback message that provides feedback forthe first transmission and the second transmission.
 25. The method ofclaim 9, wherein each of the first subchannel and the second subchannelis a different listen before talk subchannel of the carrier.
 26. Themethod of claim 9, wherein each of the first subchannel and the secondsubchannel is a different bandwidth part of the carrier.
 27. The methodof claim 9, wherein the transmitting or receiving further comprises:receiving a first transmission of the first data packet via the firstsubchannel of the carrier and a second transmission of the first datapacket via the second subchannel of the carrier, wherein each of thefirst transmission and the second transmission is self-decodable. 28.The method of claim 9, wherein the first data packet is a packet dataconvergence protocol (PDCP) packet.
 29. A method for wirelesscommunication by a base station, comprising: transmitting configurationsignaling indicating a mapping of a first logical channel to a firstsubchannel of a carrier and a second logical channel to a secondsubchannel of the carrier; and transmitting or receiving a transmissionof a first data packet via the first subchannel of the carrier and aduplicate of the transmission associated with the second logical channelvia the second subchannel of the carrier based at least in part on themapping.
 30. A method for wireless communication by a base station,comprising: transmitting one or more grants scheduling transmission of afirst data packet in a first subchannel and a second subchannel of acarrier; and transmitting or receiving the transmission via the firstsubchannel and the second subchannel of the carrier based at least inpart on the one or more grants.